Refrigerating apparatus.



M. F.' E WEN & A. L. McCURDY. REFRIGERATINGAPPARATUS. Arrucmou mfp nov.4. |915.

'3 SHEETSH-#HEET 2.

ggfs@ Q.-

Patented Mar. 12', 1918.

woont 1r. EWEN Nn annum- L, s. manner, or

LA'RSENICE MACHINE @Miam-(maf), 'non or nnnwng f l To allen-hone:comrer'n:v l Y Beit .known that we, MALCOLM. F. EWE-m and Agrumi L.y S.McGUiip'y, they former a citizen ofthe United Statesand .the latte;y asubject of Great Britain, and-residents o Chicago, in the ,county ofCook. and State of 111111015, have invented certain ncw .and.

useful Improvementsin Refrigerating paratus,and we do herebydeclare'thatI t followingis a. full, c1car, and exact descrip:

tion thereof, reference .beinghadtqthe accompanymg drawings, and. totheletters of reference marked lthereon, which.; form a.

' ,partQjjthisfspecifcatiolig, This inventlpn relatesto improvements in;

apparatus and consists of the nafter described and more par:

matters her ticularlypoited out in,v the appended claims. l Theinvention .relates to a refrigerating ap aratusj of the absorptiontypewhich ined es in general :1 generator lor 'Stil1', a n albsorber,acomblned condenser andI I iquid'lfef celve'r and an es pansion chamber`or coil and in a'dditiom Includes avalve'interposed 25 sion chamberOrcoil forfcontrolling the. adad,

between, the liquidfreceiver andl the expan? f `mission 0f liquidrefrigerant thereto, lThe improved .apparatllis is of ,the-kind o u'slysubjected, in vthe normal operation of.. .the apparatus, the .one toheat andthe otherv tothe action of. a cooling agent. Means are 1 Iknownasa continuously'operating.. a paratus in which the generator or stillenthe absorber are ahvays used res ectivelyais a. ,still anchas` an.absorber an are. contlnuprovided for "withdrawing the Vliquid.satuf.

sorber. and for delivering A4it. 'into the fstill,

l 'andathepressure generated bythe still isl madeguse of to lforce the.desaifturated. weak liguoijrom. thel still to the al'faerbeij.

, The: eissfeltliL idea. 'ef ...the vaptaratus:

the appli cationz referred to', i s .to1 correlate [the geneiatin'pxpartof theapparatns on the.l

mailand andl the refrigerating'part ofthe' apparatus 'on the other handthat thev charge seealduan af-nitq'n'mtatf aledpnmber 4,1915. Serialllo.59,50%. if* 1 put back into the receiver. f

onrcaemgnnrnpfrs; estimons 'ro in, Ithe liqnidreceiven'! the: yone ,ofthe ap aratus whichis common-tc both sides,

placedby an equal or yproportional amount I nthe apparatusdescrihed'inthe application referred to., a watenmotondrfiven .pumpvvas'shovvn which constituted. both a measurin device and the means fortrans- .ferrin t ,e absorbent from the :absorber to thefrit1- 1 incertain timedrrclationwith the operation of the valve.1c on r 1 ectingIthe' still takenvfio'm the liquid receiver -is substantlallv re-v withthe -fexpansipnchamber,. t he,r eby bring- .aboutthe correlationibetlweerthe wo si, es. ,'o f the apparatus above. referred; to.

There are several objections-.t0 the use: of.

"a pump for this purpo'se'. Fiifst, in an .'ap- Matus ofvthe'kintil,itadoes not constitute as'fecient la measuring'device v asit might benl I n the, second place, a. watermo rdriven pump of the kinddescribed, depe' xd..- ,fmgupon Vthe Water pressure for the v'operaofthe motoris no't. 'capableof use unll. cr cumstances, as thepressurelpro- 1nordlnary municipal systems :snot

. .a lxriways. suloient .to bring about' therequired operation. Inaddition, the water-motor is not economicavlJms it requires) more wateridr its-operation than lis necessary for the supply o Acooling'ratei-,in thc `operation of tlqapparatus sq that. the exce: water -iswasted eso' far as its use? as .a 'cooling-agent ,tityof abso'r ent to.betransferredfrom the absorber'to-thestillin the desr'edgtimed repta'cl'ei opened. to, connectzjstid receptacle marsan.. y

operation of :the 'valves' of the receptacle may' be slow acting'and oflittle' power so loo l2o '.from

that where-1a water motor 'is used .for the c tion of the valvesra verysmall amount o v'vaterat low-.pressure isf'required, making' tpossxbleto use a Small bypajss from the supply pipe lthat suppie the reguiredamgulntofccoling water or'coolin'g t e' abaor v .I .i :The advantg ofoui` inventiOniWm Pi pear more' clearly as we proceedI with ourspecication.

Iii-the drawing'sa representing our improved refgeratingapparatus infront eleration.-

Fig.-2' is a view representing a transverse plan` section' throughFig.F1 1in i; plane indilge" l 'the device shown in Fig. 8, in a planeindicated b'y the line lFig. Kwis-a view. representing a vertical lcentral sheet-ion through the sammle als aow offcombined liquidrefrigerant from the liquidvreceiver 1g. B .is fa detail sectional viewon 'an' enlarledscale showing the device by means of w ich the'strongliquor Vis conducted the absorber to'thestill in predeterminedlmeasured.. mounts at predetermined intervals'rf" Fig. 4 isf a'vie'wrepresenting a transverse section through lone' ofthe valvefplugs 'of,coolin tank andvr the `absorber and combined condi;

liqFuid-receivel: contained therein.

6 is an enlar Ved detail sectional view o f the headof the a Fig. 7 is'a sectionalview of a vtlve that condenser and'- L' expansion coiLf Fig.''8L-is" a "detail, pe'rsp'ec'ztive'A 'vie'vir ill .\1av tratingfapart ofa valve stemand its -asso- -actuatingfcamz embodied in our'in- Theapparatus illustrated hereinas "am embodiment Eof .our invention isdesigned more particularly'for the-use of ammonia as 'thererigerantandjofwaterfas the abi."

'lfts .isnot necessarily' limited tothe usen clef-such refrigerantand lReferring-"now to'the apparatus illus-+1' trated-.iinthe drawings;: 10indicates the 4indicates the absorber"4 'l 'i 2g1nd1cates the combinedcondenser and .liquid refrigerant `pipe leadingl 1P. lnd

orteil; 'ack tojtbe absorberend-adapted. for v.'vaporized, ded'te'f' t?ammonia gas, to themrber 11.

sobentpand hereinafter, without further" of such absorbent;

enerat'or or Fsti1l,-1 1

receiver, 13 indicates the' and liquidreceiver to the expansionchamben-for coil 4, .and f4?? ndicates thereturn 4 from the l.saidexpansion chain`v .lll

nser and qrber and of the valve means what controlsthe-llow` of weakliquor densedandfretn'rned to the still.V

the combined condenser* f liquid absorbent, water2 contained therein.The admission of thellquid refrigerant to the expansion coil or chamberis controlled by a valve mechanism 15 interposed in the 4pipe 18, whichvalve mechanism is operated t0 Dositively o'pen the Valve4 automaticallyan periodically in'a manner presently tobe described.v

AAny.convenient means may: be used for heatin 4'the' stillv or generator1 0 and We have ustrated herein. to that end thetamiliar gas burner.l 16indicates such a burner, the same consisting of va large" pipeextending'longitudin'ally belowvthe still 10 1n a position toheatitnndfbeing provided vwith 4 suitable-orifices forthe escape ofthe".

` fuel gas supplied to it from ymy ysuitable source.- Thestill' 1'0 isin'ltheform 'ofja'nv yelongated drum andis preferably surround# edatjthe top, sides and endsy by` means v'oli a heat insulating jacket 17of any-suitable or desirable construction. A stacli 1S. fixed near oneend tothe'. top of the jacket is provided for theles'cape of theproducts of combustion." The burner is intended to burn Vall thetimethat the apparatusis in operetion andmay be controlled byimy suitablehand valve.

-v The absorber 11'. and' the coxr-ibined con?y denser and j-liquidreceiver 12 are 'preferably made as illustrated, in' the formof"up1"ight-,fy

elongated, -cylindric shells` closed at top and bottom.`v Said shellsare supported-in 'any convenient vrai/ in an upright tank 21 which, 100Said tank-is 'supported by upright 4metal angle 'ba'rs 25E-Secured .toits upright corners l and .also .providing a support; for the `still.10`and for itsV jacket 17a` VThe uprig'hts-Y isfconstructed to'contain-cooling fwa'ter.

themselves are supported nsk'ids 22 whichraise them above theflo'or 22huponr--which the apparatus-rests. ff i The aan 1o is connecte en-thumbnail condenser and liquid receiver 12 Vby means fthen'verticallyfupwardftoa point above-.the

tank v vhereV thevare joined togetherad to aijconnnondis'charge 'pipe''25""vvhich'e'nt'ers the combiiied'condeiiserfandliquid vreceiver Y 412at the top.;` The ypipes 24,24. consumar; .farectifier in which thewater vapor carried:

gasis comstill byfmans of. a pipe 26. Thesaidpipef. f f. lis verticallyand "its upper-end is .colmected'tdthe'i'bottom ofthe" absorber' :Whileitl is connected d l Vvivait internos@ enf .1. retiring de;

fromthe still'. with4 the f ammonia The. absorber l1' is connected fvvit egteanatiogffmeemnngand dramo't umv ,Ofntheistron lliquor endl-todirect said that' conducts the liquid ammonia fromthe combinedvcondenser and liquid receiver to the expansion chamber or coil, 4thus,maintaining the correlation hereinbefore vreferred to.

27 indicates as a -whole the measurin device referred to. 'The sameconsists as s own herein of a receptacle' adapted to 'contain a certainpredetermined amount of liquor and of inlet and outlet valves' adaptedtoicontrol the How of liquor first fron; the absorber to..

I ll said' receptacle and next from Said 17e- .ce'ptacle intbfthestill.;

casings 28* pipe 28. In 2 8,^is 1o'cated the inlet valve 29' and inother` casing'is located theoutlet valve 30. The receptacle is thuspreferably 'made in this l.way-in order to simplify the valvecon-.structionsi-fThe casing 28l consists of a sleeve 31,"havig an integralclosedend 32 one casing', namely, the casi and. closed at-its' other end by means of a.

threaded plug 38.l The inner bore or the sleeve vis redubed near'one endto rev-ide a valve seat 84, against which is a a'pted toclose a valve"vplug 35, the reduced lend 36 'of l namely, thev part 2G ,"is secured inja .-t

which has'beari'ng in vthe slnaller'part of the sleeve. v -A-spring'37is inter between the valjve -and ythe threaded c osing plug 83 ofthe'sleeve in'such manner as to normallv hold -said'fvalve--closed on'its seat.. Prefv erably the valve plug has anannular-gasket.

35l to make a tight jointjagainst 'tliefselltl4v A valve'stem38 is fixedtothe valve plug. 85.. and has bearing lin' a' through .the-integral'encasing.- A stungfboxi) is provided to prevent leakage. One part of theipe 26, readed nipplethat 'gives accesjto the vcasing 85 lon the inletsidefo the valve e :casing 28 is-o the' same 'construction and likemerals with the superscript f The space uit s point onthefoutl'ct'sidfofthe valve seat'. '34 is connectedby'thpipe 28 with tlie' part largediameter, 269,1 directly* with fthe still 10,1 Inythspipefispreferalzrly intposed Each of said cusings 28",l

28 indicates the ref ceptacle, which in this'fcase,l consists of two,

28"', connectedl by means of la, t:ligborhood of the valve l'that.controls the'.

'wasewavbod f ,32pf the "valve 'It-imc; that when'l said piston rodmvesin the. r etnrn direction, the valve 35.* 'wil l' be pgguerf ygminedperiod, the first named :valve 2 5be1ng closedonits seat duringthisti'm'e. t' i The operation of the measuring-transfer' Valv 35,,i.s,.openerLf the strong liquor -i's'ciiuse'd 'to dow bv gravity from theabsorber intojthejcnsi-ng' parts -areletter'edl 'with' thesame nuolfthe" casing 3 2* Y infthis case iS mada tank 40; the.-reduce'd lends ofsaid casings being as shown, secured in one upright Wall yof saidy tank.

the; end 511.* is

2) arra' Ihorizontaill "above end somesupported on the upright anglebarsThis water motor is, as shown, 'o istonf cylinder construction and issupplie witha small amount o'flwater-in such manner as to impart aslow-'reciprocating' movement to itspistcnrodi ven in one direction, but

'so that i t will means .of'a water motor 42, (see Figs. land i I flowof .refrigerant into the. 'exp'ansit-in, coil, Said piston'rodjcarries'a frame upon which is xed two bar 45 and a-cam bar 45*.'These bars-are arranged' to engage the trip cinisel, 415,.,

and 1are vfadapted, when` they St-ill`e the, of their respective valvesterne,

trip ends 90 Clim-bars. liaxnely,afcam. 4.

respective valve'a'nd to' hold 'said valves in .ope position duringa-predetermnedtirne interval-#that is to say, 'takes the piston rod 48to 48 is moved-in one directidmthevalve 35,'

will be liftedfron'rits seat ai'uiheldv inl that los position for afpredetermined length of time,

valve .opened and held open duririg a device is .as follows:.-.when' thecusings :indfheir connecting pipev from inletlA valve seat 34 to theoutlet vali-e seat 34?) is, filled from the iabsorbe'n" 'The liiwfrii'he'V `receptacle is prevented b v the closed valve 35. When th(` cum bar45 hns passed beyoud the valve stem 38, the spring 37 wil-l iiimeasuring receptacle' comprisedV b v'the two the' timethtjit carrythelength of the cam bar beyond the valve stem It cause the `measuringreceptaclel from the" ab.

' drain into the absorber inlet valve of the sorber.

i Upon-y the return movement of .the piston 43,'thevalve `35x is usopening commun rece tacle'and is o lar diameter,

not,` prevent the liquor tween th refrigerant of 'the the receptaclepassing1 pressure,` -and'bein iqulckly absorbed there-l The' actioncontinues.

moma-'gas top o that itwill rapidly end quicklyvabsbrb the us i jood-lngco' 47, w

coolingftank 21 and ina com of which 'is separated frox .u 56'containing the absorber t -blned means of' :an upriglit e weak f liquorisiV .discharged l in' a4 the Still inte. .the ab. pressure withinthe'f'still xniliar manner under the 4o m theitop'o theiabsorb chargment n condenser and in the casel referred to.` .the water inthe thestill. the high the .still ueito the heat of generation, does' inthereceptacle from owln into the still. T into the still 10. l While theoutlet' valve 35,*

generated refrigerant'in -the tog'of. `the still,

fiqws into and fills t lndladdsiits pressure tothat 'of .the lsp ereceptacle and the still.vv gas retained cooled. theeooli'ng water intheauxiliary v cooling tank 'so as to greatly reduce-this such -smallamountof liiior en passesfrom the-ab- B01- ber into e receptaelevas before and'-t'h of theapp lcation hereinbe ore artition wall@ ooo ing, tank,v`which is subis jectedjto the heat' of the coils through which `the we'"uo'r,.f aes, from coming :in te'f f 'thefabsorher and' the', combined*condenser ndjlilsiid reeeiver1'- bspw PS. inthe; toy I to close thusclosing raised from its seat, ication u betweenthe As the pipe- 26pressure in he receptacle is thus is fopen, the

e receptacle oil communication The inthe receptacle isA4 orwardmovementvl valve 35 vis opened, Ias is contained in hrouglrthef pipe 26lr comparatively low er 1seonnectedwith h rough thelam' f the absorberso.

isQlocated-in the artment there' thecompart `andl the com liquidreceiver iby artition'v val1a48*v as'.

prevents heopening' and alve.V being foon-y eeptacle. The said-device,one'tooth to-aetuate therlever, isA provided with severalteetli 'eralvalve vvhile, the, piston rod 43 .predetermined length.

'water frornl a by-Pagssj driving said motor.- thro'ughltls by-passpipe'iscontrolledbya vhand is 'conducted'.tlirou'gh charges `'into thetank -`1neasuring de',v. ice.,l :,The Stank 21 an respectivelyl bypipesg, 57, through 58,1eadin fpsal of t It willjbe ma 1 t. L uidrece1ver for-use intheexpansionjchamrefrablyfinterposed af berI mayl'aeAuzfriecll and. thus the capacity-fof I lil" -a givenv Va'pl'niratusbeiShed. .While in describing have referred,to ce1tamdetailsof`conjstrucl' l tion arrangement, it

thatlfour vinvention is to be it'ed Ithereb except as pointed outinthepphdegq i We claim as our'inventionzs 11; 1n s refrigeratin'gination'withastill', /an ""absorber, o, :ecanbinelf-ieuitii'ei-iser andliquid receiver, any

hd "describedgiin ,coni

` tnedbsgrber: .and Lthefstill liquid refrigerant into the expansion'vcharn-A erv or coil. 1s operated by alever'l as in the case of`mentioned application." This lever is wel hted in such manner as'tovalve in closedposition' be raised to device '52 tix water motor thatactuates vthe measuringdevice.

mounted upon the vided adjlllsted on 4the bar to properly correlate lwitt ates the valves ogthe the apparatus in the prior normally hold theVand is adapted to v o en thevalve 4"y means 'of a on the piston rodA430f the, valves 'in the:y lhe deice 52' is slida'bly piston rodf'43and; is pr()- .L

se that it maybe' with a 'set screw 52* l instead' 'ff having i u,@ranch-:will y openmg and c loslngzzmovementsf of the.

1s moving 8,5

he obhngrwater is, supplied to' the tank froma ,p'

, a Small amount ofthe this `'pipe lsdirected through Slinto 'the watermotor' --42 forfg'o' `measuring' 'clevie maybeused in detii of.refrigeration tlia the apparatus, sin,' Aby .tlie cubica1content cisaid'xne'ajs-v vbychanging the frequency red to thefcombmedcondenserandI 1iq'"` Y' :11.0"

increasedl our invention w `apparatus rofjthe j wald eliairiber and. t.*referral inerte@ fiati' sorbent to be tranwsielredtrom4 the\absorber tothe still,- the still being located below said receptacle, means foroperating said valve, and means for transferring by gravity the contentsof said measuring device to said still at predetermined intervals intimed relation with the operation of said valve.

2. In a refrigerating apparatus of the kind described, in combinationwith a still, an absorber, a combined condenser and li uid receiver, anexpansion chamber, a vaillve interposed between said combined condenserand liquid receiver and said expansion chamber, and conduits connectingAsaid several parts, a measuring device interposed between said stilland said absorber, said still being located below said measuring device,means for connecting said measuring device in alternation with saidabsorber a-nd with said still, and means for operating said valve intimed relation with the means which connect said receptacle with saidstill.

3. In a .refrigerating apparatus of thelind described, in combinationwith a still, an absorber, a combined condenser and liquid receiver, anexpansion chamber, a controlled valve between said combined condenserand liquid receiver and said expansion chamber, and conduits connectingsaid several parts, a measuring receptacle located between said absorberand said still, said still being located below saidmeasuring'receptacle, inlet and outlet valves in said re ceptacleadapted to be operated iii alternation, and means for opening the inletvalve of said receptacle and for operating the controlling valve to theexpansion chamber in predetermined timed relation.

4. ln a refrigerating apparatus of the kind described. in combinationwith a still, an absorber, a combined condenser and liquid receiver, anexpansion chamber, a. positively operating valve connecting saidcombined condenser and liquidlreceiver and said expansion chamber, andconduits connecting vsaid several arts, a measuring receptacleinterposed etween said absorber and said still, inlet and outlet valvesprovided in said receptacle, the one connecting it with the absorber andthe other connecting it with the still,vmeans for operating said valveto open and close them in alternation,I and means for actuating saidpositively operating valve connected sion chamber'in timedA relationwith the opening of the outlet valve. of said receptac e.

` 5. Ina refrigerating apparatus of the kind described, 1n combinationwith a still, an absorber, a combined condenser and liquid-receiver, anvexpansion chamber and with the expan conduits connectingsaid severalparts, a

measuring device interposed between Said still and said absorber adaptedto measure predetermined quantities, the said device consisting of areceptacle rovided with inlet and outlet valves, said va ves beingadapted to be operated in alternation, a pipe connecting the inlet sideof said receptacle with said absorber, a pipe of comparatively largediameter connecting the outlet side of said receptacle with the still, apositively operatcondenser and liquid receiver and said expensionchamber, and means for actuating said inlet and .outlet valves of themeasuring device in alternation and said positively operating valve infixed timed relation with said inlet and outlet valves.

In testimony that we claim theforegoing as our invention we afiix our sithe presence of two witnesses this 18th day of October, A. D. 1915.

MALCOLM FJEWEN. ARTHUR L. S. MCCURDY. Witnesses:

T. H. ALFnnDs, KARL W.- DOLL.

ing valve interposed between said `combined.

atures in

